{"id":28,"date":"2020-03-15T11:20:23","date_gmt":"2020-03-15T15:20:23","guid":{"rendered":"https:\/\/sites.bu.edu\/gpips\/?page_id=28"},"modified":"2020-07-29T11:22:51","modified_gmt":"2020-07-29T15:22:51","slug":"data-release-4-dr4","status":"publish","type":"page","link":"https:\/\/sites.bu.edu\/gpips\/data-release-4-dr4\/","title":{"rendered":"Data Release 4 (DR4)"},"content":{"rendered":"

Data Release 4 (DR4) contains the complete, reduced GPIPS data set. All data products in DR4 are described in Clemens et al. (2020)<\/a><\/span><\/strong>.<\/p>\n

Overview<\/span>:<\/strong> GPIPS was performed as observations of a 9×9 arcmin grid across Galactic longitudes 18 – 56 degrees and Galactic latitudes -1 to +1 degree. Each observation used the 10×10 arcmin field of view (FOV) of the Mimir instrument. Each observation consisted of 6 (or 7) distinct sky pointings (dithers), offset by about 15-18 arcsec from each other. At each pointing, the Mimir instrument was used to collect 16 (or 17) images, each through a distinct orientation of the cold, half-wave plate prior to analysis by a cold, fixed wire grid and detection by the 1024×1024 array detector.<\/p>\n

As a result, there are 3,237 different sky fields (FOVs) comprising GPIPS and the DR4 data products fall into two main branches: FOV-based<\/strong><\/a><\/span> and unique star based<\/span><\/strong><\/a>.<\/span><\/p>\n

In common to both branches is the GPIPS Field Properties Summary Table<\/span><\/strong><\/a>, which lists information about each sky field observed, the hand-written observing logs<\/strong><\/a><\/span>, and the GPIPS Release Notes file<\/strong><\/a><\/span> that contains update information and suggestions.<\/p>\n

The FOV-based<\/span><\/strong><\/a> data products include, for each of the sky fields: a deep photometric image<\/strong><\/span> (in FITS format); a catalog of stellar photometry of all stars in a field (a PHOTCAT<\/strong><\/span>); a catalog of stellar polarimetry (a POLCAT<\/strong><\/span>); a DS9 overlay<\/strong> <\/span>(region) file for the deep photometric image; and a printable image<\/strong><\/span> of the field, with overlay (in PS and PDF formats). In addition, for the FOV-based release, there are archival catalog matching files for Gaia DR2<\/strong><\/span>, 2MASS<\/strong><\/span>, GLIMPSE<\/strong><\/span> (Spitzer\/IRAC), and WISE<\/strong><\/span> stars that match to GPIPS stars, and that do not match to GPIPS stars.<\/p>\n

The unique star based<\/span><\/strong><\/a> DR4 release consists of a single file of resolved stellar duplicates with archival catalog match key data fields.<\/p>\n","protected":false},"excerpt":{"rendered":"

Data Release 4 (DR4) contains the complete, reduced GPIPS data set. All data products in DR4 are described in Clemens et al. (2020). Overview: GPIPS was performed as observations of a 9×9 arcmin grid across Galactic longitudes 18 – 56 degrees and Galactic latitudes -1 to +1 degree. Each observation used the 10×10 arcmin field […]<\/p>\n","protected":false},"author":15792,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":[],"_links":{"self":[{"href":"https:\/\/sites.bu.edu\/gpips\/wp-json\/wp\/v2\/pages\/28"}],"collection":[{"href":"https:\/\/sites.bu.edu\/gpips\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/sites.bu.edu\/gpips\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/sites.bu.edu\/gpips\/wp-json\/wp\/v2\/users\/15792"}],"replies":[{"embeddable":true,"href":"https:\/\/sites.bu.edu\/gpips\/wp-json\/wp\/v2\/comments?post=28"}],"version-history":[{"count":10,"href":"https:\/\/sites.bu.edu\/gpips\/wp-json\/wp\/v2\/pages\/28\/revisions"}],"predecessor-version":[{"id":295,"href":"https:\/\/sites.bu.edu\/gpips\/wp-json\/wp\/v2\/pages\/28\/revisions\/295"}],"wp:attachment":[{"href":"https:\/\/sites.bu.edu\/gpips\/wp-json\/wp\/v2\/media?parent=28"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}